Alright, this has gone on long enough!
1) Zero in on a market where you know money is being spent (e.g. weight loss)
2) See which product has the highest gravity
3) Send traffic to that one
If you can make it work, start rotating other competing products to see if you can get the less promoted (i.e. lower gravity) ones to convert better.
4) Rinse & Repeat with the next market
=+=+=+=+=+=+=+
Catching *HOT* products on the rise:
1) Get a subscripiton to CBEngine.com
2) Check CBInsider to see which products have the highest momentum
3) Go to cbtrends.com, type in the vendor ID and verify
that the popularity graph is trending downwards and the gravity graph is trending upwards.
Catch the product on the rise before too many others jump in (i.e. bid on the product name w/ PPC and create a great presell page).
That should get you started. Now go make some moolah.